What is subjective experience?

I don't think this is a question that can ever be answered xD....actually, I suppose when we have gained the ability to fully map a brain, then we can.
Problem is this, we don't know if everyone experiences looking through their eyes the same way. Like with colors for example, we have a frequency of light, which we assigned the label blue. But, we don't know if our subjective experience of blue are the same. In the same way, with a cat we don't know if they would even experience these things in the same way.

Now if the brain is fully mapped out, then we perhaps could figure out how the "experience" so to speak is bound to the labels and then perhaps we could compare
For objects or plants though, it gets a ton more difficult
In fact, i'm actually a tiny, tiny bit "color-blind" i basically don't see green and red normally which causes contrast issues. so~ my perception already is altered there